Supporting bracket



May 19, 1925.

. 1,538,252 E. MARTINEZ. SUPPORTING BRACKET Filed Aug. 14, 1923 2 Sheets-Sheet l Qwmmtoz @QMM.

Mai 19, 1925. 1,538,252

7 l E. MARTINEZ SUPPORTING BRACKET Filed Aug. 14, 1923 2 Sheets-Sheet 2 gwuento'a Patented May 19, 1925.

UNITED STATES ENRIQUE MARTINEZ, OF GETT YSBURG, PENNSYLVANIA.

SUPPORTING BRACKET.

Application filed August 14, 1923.

To all whom it may concern:

vented certain new and useful Improve,

ments in Supporting Brackets, of which the following is a specification.

This invention relates to certain new and useful improvements in supporting brackets particularly adapted to hold books, music or the like.

The primary object of the invention is to provide a device of the above kind which embodies the desired qualities of simplicity and durability of construction and embraces features of adjustment whereby the book support per se may be readily accommodated to the users under allpractical conditions.

Another object of the invention is to provide a book supporting bracket which may be taken apart and folded for occupying a minimum amount of space when not in use.

Another object of the invention is to simplify and improve devices of this kind whereby the same may meet with all of the requirements for a successful commercial use. 7

Other objects willbecome apparent as the nature of the invention is better under stood, and the same consists in the novel form, combination and arrangement of parts hereinafter more fully described, shown in the accompanying drawings and claimed.

In the drawings, wherein like reference characters indicate corresponding parts throughout the several views, a

Figure 1 is a front elevational view of a supporting bracket constructed in accordance with the present invention.

Figure 2 is a side elevational View of device shown in Figure 1.

Figure 3 is an enlarged fragmentary view illustrating a detail of the invention, and

Figure 4 is a view similar to Figure 3 illustrating a further detail thereof.

Referring more in detail to the drawings, the invention includes abook holder per se consisting of a shelf member 5 attached to the lower ends of a pair of parallel upwardly extending strips or bars 6, the points of attachment being indicated at 7 and constituting pivots whereby these members 6 the Serial No. 657,341.

may be folded toward the member 5 for occupying a minimum amount of space when not in use.

The shelf 5 is adapted for supporting reception of a book with the back of the latternesting against the bars 6 and the upper end of the book may be engaged for holding it open by means of a pair of resilient springs or clasps 8 which are carried by slides 9 that are longitudinally movable on the upper ends of the bars 6 and maintainedin any desired adjusted position by means of set screws 10, see Figure 2. The structure thus far described. constitutes a practical form of holder for books or music, but in order to accommodate the same as a supporting device for artists panels, a relatively long cross bar 11 may be slidably disposed upon the bar 6 by means of cuffs 12, set screws 13 being provided for maintaining the cross bar 11 in any desired vertically adjusted position. The cross bar 11 has slides l linounted on the ends thereof through which are positioned the shanks or hook members 15 upon the rearwardly extending portions of which are threaded nuts 16 adapted to engage the rear side of the bar 11 for clamping the hooks 15 a desired distance apart. The bills of the hooks 15 are at the forward ends or sides of the bar 11 and depend so as to engage the upper edge portion of the artists panel which is placed upon the shelf 5. A trough 17 is attached to the under side of the shelf 5 or formed integral with the latter for reception of such articles as brushes, pens or pencils.

The supporting bracket for the book holder above described includes a pair of horizontal parallel spaced bars 18 which are provided at their ends with eye portions 19 through which the bars 6 slidably project, and the lower bar 18 is formed with a guide as at 20 through which a ratchet bar 21 projects, the lower end of this bar 21 being pivoted as at 22 to the shelf 5. The lower bar 18 has a pivoted catch 23 adapted to engage the teeth of the ratchet bar 21 for maintaining the book holder in any desired vertically adjusted position relative to the bracket bars 18, and the latter bars are rigidly connected by the spider 24 which has the free ends of its arms at tached as at 25 t0 the bars 18. The arms of the spider 25 converge and join reai rd y o the ok h lder as s en in g re 2 where they terminate in a bifurcation composed of a pair of arms 26 and 2'? as shown in Figure 4, the inner surface of the arm 26 being provided with a ratchet suriace mating with a similar surface on a bracket arm 28 disposed between the arms 26 and 27. The bracket arm 28 is preferably of the general S-shape as shown in Figure 2, with the other end of the same adjustably connected as generally indicated as at 29 with a hinge member at) in substantially' the same manner as described above with respect to the elements 26 and 27 and 28. in both instances a bolt 31 is provided having a clamping nut 32 threaded thereon for maintaining these parts in their adjusted relation, the bolts 31 acting as hinge pins between the parts.

The hinge member or leaf is pivotally connected as at 32 witl a somewhat similar hinge leaf or member 33 so that these parts move horizontally to different angular positions relative to each other and in order to maintain these parts adjusted and against relative accidental displaceniei'it. a disc 34 is secured against the top edges of the same by means of the pivot and a bolt 35 which passes through a hollow enlargement 36 of the hinge member 33, the disc 3% being provided with a circular marginal slot 37 through which passes a bolt 38 hai' ing a nut 39 threaded thereon. The bolt 38 is rigid with the hinged member 30 and the nut 39 bears against the upper surface of the disc 3% so that it is readily apparent that the adjustment can be secured as above mentioned. The hinge member 33 is provided with a rearwardly projecting arm &0 upon which are adjustably mounted a pair of jaws 41 adapted to engage the upper surface of a suitable support such as a desk top or the like as at $2, and these aw members 41 are preferably in the nature of elongated strips having lined taces and cooperating with similar jaws {l3 adjustab'ly mounted upon a further arm 41% which is held against the hinge member 33 by means of the bolt 45 which extends therethrough, and a nut d5 threaded upon the lower end of said bolt.

From the foregoing description it will be seen that the book holder may be adjusted together with the bracket parts between the same and the pin 32 for positioning the device at any desired laterally swung point while various adjustments may be had through the clamping hinges as at 26 and 29. Further adjustments are had by varying the point oi attachment of the bracket to the desk top through the clamping jaws ll and i?) and by vertically adiusting the book holder relative to the bars 18. That the book holder per se may be readily accommodated under all conditions is thus apparent and it will be apparent that the bars 6 may be detached from thebars 18 so that these bars 6 and the ratchet bar 21 may be folded on to the shelf 5, the bar 11 being also removed together with the slides 9. The bracket arms will then be folded into a compact arrangenent and the device will occupy comparatively little space during shipment and when not in use.

Minor changes may be made without departing from the spirit and scope of the invention as claimed.

Vv'hat I claim as new is:

l. A supporting bracket of the class described comprising a horizontal rack; a pair ot upwardly extending parallel spaced bars having their lower ends pivotally connected to said rack. a vertically adjustable trame comprising upper and lower horizontal bars provided at their outer ends with guide eyes slidably receiving the first named bars, the lower bar 0'! said frame being provided with a central guide, a spider having its arms connected with the frame bars, the inner ends of said arms converging toward each other and being equipped with a clamp, a

ratchet bar pivotally connected at its lower end to the intermediate portion of said rack and extending upwardly through the guide in said lower frame bar. and a pawl carried by said last named bar for engagement with the teeth of said ratchet bar.

2. In a supporting device of the class described. attaching means comprising a pair of clamping jaws provided at corresponding ends with vertically aligned tubular p0r tions, the upper tubular portion being provided with a hinge, a disk resting on the leaves of said hinge, a bolt passing downwardly through said disk and tubular portion, a clamping nut on the tree end of said bolt. said disk being provided with an arcuate slot, a bolt carried by the outer leat oi said hinge and extending through said slot. a nut on the last named bolt. a clamping de vice carried by the outer leaf of said hinge. and a bracket arm a-djustably connected to said clamping device In testimony whereof I affix my signature ENRIQUE MARTINEZ. 

